晋南黄土丘陵区的节水高产高效种植结构模式山西省夏县西北部的鸣条岗区，海拔高程４２０～４９０ｍ，两侧与周围平原相对高差４０ｍ左右，年平均气温１２．９℃，无霜期２０６．６天。区内土质为碳酸盐褐色壤土，土层深厚，耕作精细，光照充足（年日照时数２２００．２小... The water-saving, high-yield and high-efficiency planting structure model in the loess hilly region of Shanxi Province is located at the elevation of 420 ~ 490m in the northwest of Xiaxian County, Shanxi Province. The relative elevation difference between the two sides and the surrounding plain is about 40m with the annual average temperature of 12.9 ℃, Frost-free period 206.6 days. The area of ​​soil is carbonate brown loam, deep soil, fine farming, adequate lighting (annual sunshine hours 2200.2 small ...